<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style type="text/css">
    .container{
        margin: 100px auto;
        width: 200px;
        height: 200px;
        background-color: #FF9966;
        box-shadow: inset 0 10px 0 0 red,inset -10px 0 0 0 orchid, inset 0 -10px 0 0 green,inset 10px 0 0 0 cyan;
    }
</style>
<body>
    <div class="container">

    </div>
</body>
</html>